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Cover: Observing estuarine currents and fronts in the Tay Estuary, Scotland, using an airborne SAR with along‐track interferometry (ATI)

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Estuaries are extremely dynamic environments where large and frequent changes in bathymetry and channel locations can occur. Because estuaries are major centres of population and industry, there is an ongoing requirement to monitor and predict changes in the current fields. The tidal range, surface wind speed, atmospheric pressure, fresh water inflow and most importantly the stage of the tidal cycle affect the flow vectors. Existing boat‐based methods are unable to provide measurements of current fields with sufficient spatial and depth coverage for accurate modelling of hydrodynamic processes in estuaries. Remotely sensed data offer more extensive, synoptic, spatial coverage. However, previous studies to map the full details of the current field based on conventional optical and thermal imaging have been limited by insufficient temporal coverage and the lack of identifiable features that can be tracked. Synthetic aperture radar (SAR) imaging with along‐track interferometry (ATI) has the potential to overcome both of these limitations because it can retrieve quantitative measurements of sea surface state parameters and instantaneous surface flow from a single pass over a whole estuary. The preliminary results of ATI observations over the Tay Estuary, Scotland, validated with coincident in situ boat based observations, are presented here.

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01431160500043632

Affiliations: 1: Department of Geography, University of Hull, Hull HU6 7RX, England, UK 2: Communications and Signal Processing Department, BAE SYSTEMS Advanced Technology Centre, Great Baddow, Chelmsford, Essex CM2 8HN, England, UK 3: Centre for Applied Oceanography, University of Wales, Bangor, Marine Science Laboratories, Menai Bridge, Anglesey LL59 5AB, Wales, UK 4: Department of Geography, Lancaster University, Lancaster LA1 4YB, England, UK 5: Department of Civil Engineering, University of Strathclyde, Glasgow G4 0NG, Scotland, UK 6: Division of Electronic Engineering and Physics, Faculty of Engineering and Physical Sciences, University of Dundee, Dundee DD1 4HN, Scotland, UK

Publication date: October 20, 2005

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